Dumping bailer



April 9 G. L. MATYSON, 2,398,752

DUMP ING BAILER Filed April 7, 1945 INVENTOR. George L. Ala/Son 'A fro/2 NEYS Patented Apr. 16,1946

2 ,398.752 DUMPING BAILER' George L. Matson, Kiigore, Tex, assignor to The Dow Chemical Company, Midland, Micln, a corporation of Michigan Application April 1, isistsemi No. 587,073

(c1. res-19) s Claims.

The invention relates to apparatus adapted for lowering pulverulent or granularmateriais, such as gravel, into deep wells or the like.

One of the objects of the invention is to pro- Atthe lower end of the container, closure plates I 5 of semi-circular form are provided. These are hinged inside the container by pivots ilrimning through the apertured brackets I! mounted vide a dumping bailer capable of handling granu- 5 on thebottom oi theplates and the supporting lar materials having a high angle of repose.- IAnapertured brackets i8, respectively, mounted on other object is to provide a device, of the aforethe inside of the .containerat diametrically oppo said character which is of simple construction site points. In the closed position, as'shown in and in which the charge is securely and positively Fig. 1, the closure plates abut against the lower locked in the bailer so that premature unloading end I! of the agitator which acts'as a stop to is avoided. Another object is to provide adumplimit their upward swing when the agitator is ing bailer having the aforesaid advantages and pulled up so that its lower stop I! abuts the"upper additionally provides for positive assistances in guideii. I 4 evacuation of the charge on dumping the bailer. In the bore 9 of the lower guide member 8, there Stillother objects and advantages of the invention is mounted the anchor bar in sliding relationwill appear as the description proceeds, the acship, upper and loweranchor stops 2| and" 22, companying drawing and following description respectively, limitingits longitudinal movement, setting forth in detail a mode'of practicing the being provided on the anchor above. and below. invention. l the lower guide member]. Between the, upper In the drawingr Y h 2 anchor stop 2i and the guide 8, acompression, Fig. 1 is a side elevation of the apparatus largely coil spring 23 is provided for urging the anchor in section completely assembled in position for 2| upward. loading and lowering into the well. Attached to the upper anchor stopmeans 2| is Fig. 2 is a cross section on the line 2-4 of Fig.1. the closure support 24 which telescopes with the Fig. 3 is a cross sectionon theline 3-4 of Fig.1. agitatoriil. For holding the closure plates ii in Fig. 4 is'an enlarged fragmentary view of a the closed'position (as shown inFig. 1) a shear. portion of Fig. 1. pinIS is inserted in an opening 26 in the closure Fig. 5 is a similar view to Fig. 1 showing the support 24. V i i position of the parts when unloading or dumping The anchor bar 20 is provided at its lower end thebailer. 30 with a foot 21 for engaging the bottom of the In the several figures, like numerals refer to well. For suspending the apparatus, a. rope or like parts. cable .28 may be secured to the upper end of the Referring more particularly to the drawing, the stop H by means of a ropesocket 29. i bailer comprises a container l of generally cylin- In operation, the apparatus is suspended in th drical form having a diameter slightly less than vertical position by the suspending means as the well it is to enter and of suitable lengthto' shown in Fig. 1, whereby the weight of the con.- hcid the charge of pulverulent material to be tainer and associated partsisborne'on stop means dumped. The container is open at the top! and I2 on which, therefore, then rests the upper guide bottom 3. Attached to the top 2 of the container means 5. The agitator I is thereby held in its I is a pair of upper arms 4 supporting the upper 4o upper position, the length of the agitator bar guide 5 having a bore 6 in axial alignment with below the lower stop I! being such that when in the container. The bottom 3 of the container. the upper position. the "lowerend it limits the, is similarly providedwith a lower pair of arms I upward swingot the closure members II to the for supporting the lower guide 8 having a bore 9 horizontal or closed position, as shown, asthese: in axial alignment with the container. members are urged upwardly by. the shearpin 2i Mounted in the bore 6 of the upper guide} in 'in support 24 in turn urged upwardly by the ac- 3 sliding relationship therewith is the upper end tion of compression spring 23. The charge of of the agitator in on which, is mounted the upper pulverulent material is introduced into the constop II and lower stop I: for limiting the longitamer-through the top 2. The charged container tudinal movement of the agitator in the guide I. is lowered into the well and dumped by allowing At least the lower portion l3 oi the agitator i0 is the foot member 21 to strike the bottom of the tubular. Near the lower end of the agitator are well. The descent of thecontainer continues due mounted the centering arms I l which serve to to its weight while 21 remains on the bottom of center the agitator in the container, andagitate the well hole, thereby forcing the end I! of the the contents. agitator bar I! to press downward on the closure members l5 forcing them againstthe shear pin which ruptures. As a consequence, the closure members swing open as shown in Fig. 5 allowing the contents to be dumped.

To facilitate unloading or dumping the bailer cylinder, an up and down motion may be imparted to the suspending cable 28 and, hence, to the agitator centering arms l4. This motion agitates the contents of the cylinder, thereby overcoming any tendency for the contents to bridge or fail to flow out of the cylinder once the closure members are opened.

After the container is unloaded as described, the apparatus is withdrawn from the well and the closure members l5 swing into the horizontal position as shown, the device is then ready for reloading and a shear pin inserted in 26 torhold the plates in closed position.

I claim:

1. A dumpingbailer for lowering a pulverulent material into awell comprising a container for holding a'quantity of pulverulent material to be dumped; a-pair of. closure plates, each hinged at diametrically opposite points inside and near the bottom of thecontainer and together adapted to form a closure for the, container; an upper guide member supported by the upper end of the container; an'agitator within the cylinder having a tubular lower end, the upper end extending through the said upper guide means in sliding relationship; stop means on the agitator above and below the upper guide member and adapted to limit its longitudinal travel with respect, to saidupper guide means; lowerguide means supported by the lower end of the container; an anchor bar mounted in the said lower guide means in sliding relationship therewith; stop means on the anchor bar above and below the said lower guide means adapted to limit its longitudinal travel with respect to the said lower guide means; spring means mounted on the said anchor bar above the said lower guide means adapted to urge the said anchor bar upwardly; a closure supporting bar having its lower end secured to the anchor-bar and its upper end extending into the lower end of the agitator bar; and a shear pin means in the closure supporting bar adapted to engage the bottom of the said closure plates and hold them against the bottom of the agitator bar in closed position, said shear pin rupturingand allowing the platesto swing open when downward travel of the bailer in the well is arrested by the anchor diametrically opposite points on the top of the container; an upper guide member supported by the upper pair of arms having an opening therethrough in axial alignment with the container;

an agitator-bar within the cylinder having a tubular lower end, the upper end extending through i the opening in said upper guide in sliding relationship; stop means on the agitator above and below the upper'guide member adapted to limit its longitudinal travel with respect to the upper guide member; a lower pair of arms each secured to diametrically-opposite points on the bottom of the container; a lower guide member supported by the lower pair of arms having an opening therethrough in axial alignment with the container; an anchor bar extending through the opening in the said lower'guide member in sliding relationship therewith; stop means on the upper end of the anchor bar above and below the lower guide member to limit its longitudinal travel with respect to the lower guide member; spring means on the anchor bar above the said lower guide means adapted to urge the said anchor bar per end extending into the lower end of the agitator bar; and a. shear pin means in the closure supporting bar adapted to engage the bottom of the said closure plates and hold them against the bottom of the agitator bar in closed position, said shear pin rupturing and allowing the plates to swing open when downward travel of the bailer inthe well is arrestedby the anchor bar striking the bottom of the well.

3. A dumping bailer for lowering a pulverulent material into a well comprising a container for holding a quantity of pulverulent material to be dumped; a pair of closure plates each hinged inside and near the bottom of the container and together adapted to form a closure for the container; an upper pair of arms each secured to diametrically opposite points on the top of the container; an upper guide member supported by the upper pair of arms having an opening therethrough in axial alignment with the container; an agitator bar within the cylinder hating a tubular lower end, the upper end extending through the said guide member in sliding relationship; centering arms secured to the agitator bar; stop means on the agitator bar above and below the upper guide memberadapted to limit its longitudinal travel with respect to the upper guide member; a lower pair of arms each secured to diametrically opposite points on the bottom of the container; a lower guide member supported by the lower pair of arms having an opening I therethrough in axial alignmentv with the con.- tainer; an anchor bar extending through the opening in the said lower guide member in sliding relationship therewith; stop means on the anchor bar above and below the lower guide member to limit its longitudinal travel with respect to the lower guide member; spring means mounted on the said anchor bar above the said lower guide means adapted to urge the said anchor bar upwardly; a closure supporting bar having its lower end secured to the anchor bar and its upper end extending into the lower end of the agitator bar; and a shear pin means in the closure supporting bar adapted to engage the bottom of the said closure plates and hold them against the bottom of the agitator bar in closed position, said shear pin rupturing and allowing the plates to' swing open when downward travel of the bailerin the well is arrested by the anchor bar striking the bottom of the well. v

GEORGE L. MATSON. 

